Regarding Manufacturer Extended Warranties, as discussed this is mostly profit for the dealer. You should also see what is included in the fine print. I have heard, for example, with an engine problem, Ford was charging $50 deductible per occurrence. Burned valves on a V8 is $50 for each valve x 8 cylinders.
But my point for writing this, in my younger, less wise days back in 2006, I did buy into a manufacturer warranty. But the selling dealer was selling for $2200, but just for me, he would reduce to $1800. The Acura dealer said I did not have to decide that day, I could have 30 days. I researched this on the internet, and to my surprise the Acura extended warranty said you could sign up 0-7500 miles, or six months at no additional cost. And the kicker was there were many dealers selling this warranty on the internet, so I found the lowest price, which was something along the lines of $595 from a dealer in New England. In the almost 10 years I owned the car, I never needed it, even though it seemed like a really complex car.
In 2006, I think it was the first radar cruise control, integrated with a collision mitigation braking system, which included electric motor that cinched up the seat belts, pulling you against the seat back; tightly integrated voice integration with almost 600 phrases, and naviagation that allowed changing destinations on the fly, Bluetooth phone integration, AFS, run flats, torque vectoring AWD with three diffs in the rear, and a rear back up camera.